<template>
  <el-tabs v-model="message" type="card">
    <el-tab-pane :label="`未读消息(${state.unread.length})`" name="first">
      <el-table :data="state.unread" :show-header="false" style="width: 100%">
        <el-table-column>
          <template #default="scope">
            <span class="message-title">{{ scope.row.title }}</span>
          </template>
        </el-table-column>
        <el-table-column prop="date" width="180"></el-table-column>
        <el-table-column width="120">
          <template #default="scope">
            <el-button size="small" @click="handleRead(scope.$index)">标为已读</el-button>
          </template>
        </el-table-column>
      </el-table>
      <div class="handle-row">
        <el-button type="primary">全部标为已读</el-button>
      </div>
    </el-tab-pane>
    <el-tab-pane :label="`已读消息(${state.read.length})`" name="second">
      <template v-if="message === 'second'">
        <el-table :data="state.read" :show-header="false" style="width: 100%">
          <el-table-column>
            <template #default="scope">
              <span class="message-title">{{ scope.row.title }}</span>
            </template>
          </el-table-column>
          <el-table-column prop="date" width="180"></el-table-column>
          <el-table-column width="120">
            <template #default="scope">
              <el-button type="danger" size="small" @click="handleDel(scope.$index)">
                删除
              </el-button>
            </template>
          </el-table-column>
        </el-table>
        <div class="handle-row">
          <el-button type="danger">删除全部</el-button>
        </div>
      </template>
    </el-tab-pane>
    <el-tab-pane :label="`回收站(${state.recycle.length})`" name="third">
      <template v-if="message === 'third'">
        <el-table :data="state.recycle" :show-header="false" style="width: 100%">
          <el-table-column>
            <template #default="scope">
              <span class="message-title">{{ scope.row.title }}</span>
            </template>
          </el-table-column>
          <el-table-column prop="date" width="180"></el-table-column>
          <el-table-column width="120">
            <template #default="scope">
              <el-button size="small" @click="handleRestore(scope.$index)">还原</el-button>
            </template>
          </el-table-column>
        </el-table>
        <div class="handle-row">
          <el-button type="danger">清空回收站</el-button>
        </div>
      </template>
    </el-tab-pane>
  </el-tabs>
</template>

<script setup lang="ts">
  import { reactive, ref } from 'vue'

  const message = ref('first')
  const state = reactive({
    unread: [
      {
        date: '2018-04-19 20:00:00',
        title: '【系统通知】该系统将于今晚凌晨2点到5点进行升级维护',
      },
      {
        date: '2018-04-19 21:00:00',
        title: '今晚12点整发大红包，先到先得',
      },
    ],
    read: [
      {
        date: '2018-04-19 20:00:00',
        title: '【系统通知】该系统将于今晚凌晨2点到5点进行升级维护',
      },
    ],
    recycle: [
      {
        date: '2018-04-19 20:00:00',
        title: '【系统通知】该系统将于今晚凌晨2点到5点进行升级维护',
      },
    ],
  })

  const handleRead = (index: number) => {
    const item = state.unread.splice(index, 1)
    state.read = item.concat(state.read)
  }
  const handleDel = (index: number) => {
    const item = state.read.splice(index, 1)
    state.recycle = item.concat(state.recycle)
  }
  const handleRestore = (index: number) => {
    const item = state.recycle.splice(index, 1)
    state.read = item.concat(state.read)
  }
</script>

<style>
  .message-title {
    cursor: pointer;
    color: var(--el-color-primary);
  }

  .handle-row {
    margin-top: 30px;
  }
</style>
